TECHNICAL FIELD
[0001] The present invention relates to the communications field, and in particular, to
an add/drop multiplexer and a method for processing a signal in an add/drop multiplexer.
BACKGROUND
[0002] In a transport network system, a signal flow needs to be "dropped" from a node, or
a signal flow needs to be "added" to a node. A device that "drops" and "adds" a signal
flow is referred to as an add/drop multiplexer (Add/Drop Multiplexer, ADM). The ADM
includes an optical add/drop multiplexer (Optical Add/Drop Multiplexer, OADM) and
an electrical add/drop multiplexer (Electrical Add/Drop Multiplexer, EADM).
[0003] Due to exchangeability of communication information, a transport network is generally
bidirectional, as shown in FIG. 1. A service P26 between a node N2 and a node N6 is
bidirectional communication information, is added and dropped by using ADMs of the
nodes, and passes through an ADM of a node N1. Similarly, a service P36 between a
node N3 and the node N6 is bidirectional communication information, is added and dropped
by using ADMs of the nodes, and passes through ADMs of a node N4 and a node N5. As
shown in FIG. 2, an ADM generally includes a line board (Line Card) 201, a cross-connect
board (Switch Card) 202, a line board 203, and a tributary board (Tribute Card) 204.
The boards are independent boards, which is convenient for maintenance. When a board
is faulty, communication on an entire link may not be affected. The boards are connected
to each other through an inter-board interface. A signal on an eastbound link is input
into the line board 201, is processed and then sent in a downlink direction to the
cross-connect board 202 through an inter-board interface (1), is sent in the downlink
direction to the line board 203 through an inter-board interface (2), and is processed
and then output to an egress of the eastbound link. A signal on a westbound link is
input into the line board 203, is is processed and then sent in a downlink direction
to the cross-connect board 202 through the inter-board interface (2), is sent in the
downlink direction to the line board 201 through the inter-board interface (1), and
is processed and then output to an egress of the westbound link. After the cross-connect
board 202 receives the input signal on the eastbound link from the line board 201
through the inter-board interface (1), or receives the input signal on the westbound
link from the line board 203 through the inter-board interface (2), a downlink service
of a current node is extracted from a signal flow on the eastbound link and/or a signal
flow on the westbound link, is processed by using a combiner/selector and then sent
to the tributary board 204 through an inter-board interface (3), and is transferred
to a device on a client side. The cross-connect board 202 receives an uplink service
of the current node from the tributary board 204 through the inter-board interface
(3). The uplink service of the current node is processed by using a replicator/distributor
and then inserted into the signal flow on the eastbound link and/or the signal flow
on the westbound link, and enters the line board 203 through the inter-board interface
(2), or enters the line board 201 through the inter-board interface (1), to form an
output signal on the eastbound/westbound link.
[0004] Because there is an inter-board interface between the line board and the cross-connect
board of the ADM, and the eastbound/westbound link passes through the inter-board
interface between the line board and the cross-connect board, a link bandwidth processing
capability of the ADM is limited to bandwidth of the inter-board interface between
the line board and the cross-connect board, and a maximum of the link bandwidth processing
capability of the ADM does not exceed the bandwidth of the inter-board interface between
the line board and the cross-connect board.
[0005] WO 98/52314 A2 discloses an add/drop node for an optical fiber network of WDM type with preamplifiers
connected to the input fibers. Therein, part of the incoming signal power is tapped
off by means of drop couplers or splitters. The tapped-off signal power is provided
to demultiplexers, one demultiplexer being used for each direction, in which WDM information
channels are separated from each other. The output signals of the two demultiplexers
which comprise the same wavelength interval are combined in combining couplers and
then fed to optoelectrical receivers, where the information of the dropped channels
is converted to electrical signals. In order to monitor and maintain a satisfactory
transmission quality of the signal from the node, the optical power in each wavelength
channel of the multiplexed light signal transmitted in the network is measured, independently
for west and east traffic, by adding splitting couplers to the outputs of the demultiplexers.
These splitting couplers deflect a portion of the signal power to optical power detectors,
which provide signals informing on the individual power levels. Therein, the respective
preamplifiers and the fibers carrying the traffic from the node, are connected to
booster or power amplifiers, so that traffic channels can pass through the node in
a basically uninterrupted way.
[0007] US 2006/0228114 A1 describes the configuration of a single network element using a combination of add/drop
network elements to route individual optical channels of WDM signals among a plurality
of optical transmission paths coupled to the network element so that a robust wavelength-selective
routing capability is provided in said single network element.
[0008] GB 2 427 518 A discloses a telecommunications network node which is arranged to allow one set of
transponders to address a plurality of line ports. Said node comprises a series of
signal blockers which are arranged to be selectively operable on command to route
traffic to different ports of the node and to the set of transponders for adding/dropping
signals from the node. This arrangement also permits sharing of equipment of the node
such as multiplexer, demultiplexer, and splitters.
[0009] US 2003/0172319 A1 describes a system for providing distributed group-based protection switching at
a network element in a communication network. Said communication network includes
a plurality of interconnected network elements, wherein the network element
[0010] includes first and second card logic coupled to the communication network to transmit
and receive the network traffic. The system comprises selector logic distributed between
the first and second card logic that includes first and second switching engines that
have associated activity states that indicate how the network traffic is routed at
the network element.
[0011] Document
US 2006/039705 A1 discloses a technique for photonic switching. The technique may be realized as a
method for photonic switching. The method may comprise receiving at least one optical
signal at a photonic line card, wherein the at least one optical signal comprises
one or more wavelength channels and the photonic line card comprises at least one
integrated optical switch. The method may also comprise routing at least one of the
one or more wavelength channels through the at least one integrated optical switch
to a photonic bus, wherein the photonic bus comprises a plurality of optical paths
and each of the plurality of optical paths is capable of carrying multiple wavelength
channels.
SUMMARY
[0012] In view of this, embodiments of the present invention provide an add/drop multiplexer
according to claim 1 and a method for processing a signal in an add/drop multiplexer
according to claim 3, which can resolve a problem that a link bandwidth processing
capability of the ADM is limited to bandwidth of an inter-board interface.
[0013] The invention is defined by the appended claims. Embodiments not falling within the
scope of the appended claims should be understood merely as examples useful for understanding
the invention.
[0014] According to technical solutions provided in the embodiments of the present invention,
a line board is configured to receive a link signal, and the link signal is output
after passing through the line board. There is an inter-board interface between the
line board and a tributary board or between different line boards. A downlink service
extracted by the line board is output from the inter-board interface, and an uplink
service inserted by the line board is input from the inter-board interface. An inter-board
interface on a link is effectively eliminated, thereby reducing complexity, power
consumption, and costs of an ADM, and improving a link bandwidth processing capability
of the device.
BRIEF DESCRIPTION OF DRAWINGS
[0015] To describe the technical solutions in the embodiments of the present invention or
in the prior art more clearly, the following briefly introduces the accompanying drawings
required for describing the background and the embodiments. Apparently, the accompanying
drawings in the following description show merely some embodiments of the present
invention, and a person of ordinary skill in the art may still derive other accompanying
drawings or embodiments according to these drawings or description without creative
efforts, and the present invention aims to cover all these derived accompanying drawings
or embodiments.
FIG. 1 is a structural diagram of a transport network system in the prior art;
FIG. 2 is a schematic structural diagram of an add/drop multiplexer in the prior art;
FIG. 3a is a schematic structural diagram for implementing an ADM according to an
embodiment of the present invention;
FIG. 3b is a schematic structural diagram for implementing another ADM according to
an embodiment of the present invention;
FIG. 4 is a schematic structural diagram for implementing still another ADM according
to an embodiment of the present invention; and
FIG. 5 is an exemplary flowchart for implementing a method for processing a signal
in an add/drop multiplexer in the present invention.
DESCRIPTION OF EMBODIMENTS
[0016] To make the objectives, technical solutions, and advantages of the present invention
clearer and more comprehensible, the following further describes the present invention
in detail with reference to the accompanying drawings and embodiments. It should be
understood that the specific embodiments described herein are merely used to explain
the present invention but are not intended to limit the present invention. Apparently,
the described embodiments are merely some but not all of the embodiments of the present
invention. All other embodiments obtained by a person of ordinary skill in the art
based on the embodiments of the present invention without creative efforts shall fall
within the protection scope of the present invention.
Embodiment 1
[0017] FIG. 3a is a schematic structural diagram of an ADM according to an embodiment of
the present invention. The ADM in this embodiment exists on a node on a transport
network. As shown in FIG. 3a and FIG. 3b, the ADM includes a first line board 301,
a second line board 302, and a tributary board 303. The first line board 301 and the
second line board 302 may have standby boards, and therefore, the ADM may include
at least one first line board 301 and at least one second line board 302. The tributary
board is provided with at least one combiner/selector and at least one replicator/distributor.
The combiner/selector and the replicator/distributor are optical/electrical switches.
As shown in FIG. 3a, the tributary board 303 is disposed on different sides of the
first line board 301 and the second line board 302. The tributary board 303 and the
first line board 301 are connected to each other through an inter-board interface
(4), and the tributary board 303 and the second line board 302 are connected to each
other through an inter-board interface (5). Optionally, as shown in FIG. 3b, the tributary
board 303 may be further disposed on a same side of the first line board 301 and the
second line board 302, and is interconnected to the first line board 301 and the second
line board 302 through an inter-board interface (6).
[0018] The embodiment in FIG. 3a is used as an example for description. In a specific implementation
process, the first line board 301 receives an input signal on an eastbound link. A
downlink service of a current node is extracted from the signal flow on the eastbound
link, is transmitted to the combiner/selector on the tributary board 303 through the
inter-board interface (4), and is further transmitted to a device on a client side
after combination/selection processing is performed on the downlink service. In addition,
an uplink service that is of the current node and comes from the device on the client
side is received from the tributary board 303, and is inserted into the signal flow
on the eastbound link through the inter-board interface (4) after replication/distribution
processing is performed on the uplink service by using the replicator/distributor
on the tributary board 303, to form an output signal on the eastbound link. Further,
the first line board 301 outputs, from a network side interface, the output signal
that is on the eastbound link and is obtained after extraction or insertion processing
is performed. The second line board 302 receives an input signal on a westbound link.
A downlink service of the current node is extracted from the signal flow on the westbound
link, is transmitted to the combiner/selector on the tributary board 303 through the
inter-board interface (5), and is further transmitted to the device on the client
side after combination/selection processing is performed on the downlink service.
In addition, an uplink service that is of the current node and comes from the device
on the client side is received from the tributary board 303, and is inserted into
the signal flow on the westbound link through the inter-board interface (5) after
replication/distribution processing is performed on the uplink service by using the
replicator/distributor on the tributary board 303, to form an output signal on the
westbound link. Further, the second line board 302 outputs, from a network side interface,
the output signal that is on the westbound link and is obtained after extraction or
insertion processing is performed. Specifically, the device on the client side includes
a router or a switching device.
[0019] Specifically, when the ADM is an OADM, signal flows on the eastbound link and the
westbound link may be wavelength signals or sub-wavelength signals, and downlink services
extracted from the signal flows on the eastbound link and the westbound link and uplink
services inserted into the signal flows on the eastbound link and the westbound link
may be wavelength signals or sub-wavelength signals. In addition, extracting the downlink
services from the signal flows on the eastbound link and the westbound link and inserting
the uplink services into the signal flows on the eastbound link and the westbound
link may be implemented by using a wavelength selector. When the ADM is an EADM, signal
flows on the eastbound link and the westbound link may be timeslot signals, and downlink
services extracted from the signal flows on the eastbound link and the westbound link
and uplink services inserted into the signal flows on the eastbound link and the westbound
link may be timeslot signals. In addition, extracting the downlink services from the
signal flows on the eastbound link and the westbound link and inserting the uplink
services into the signal flows on the eastbound link and the westbound link may be
implemented by using a timeslot selector.
[0020] A specific implementation process of an embodiment in FIG. 3b is similar to that
of the embodiment in FIG. 3a, and details are not repeatedly described herein.
[0021] In this embodiment, a line board is configured to receive an eastbound/westbound
link signal, and the eastbound/westbound link signal is output after passing through
the line board. There is an inter-board interface between the line board and a tributary
board. A downlink service extracted by the line board is output from the inter-board
interface, and an uplink service inserted by the line board is input from the inter-board
interface. An inter-board interface on the eastbound link and an inter-board interface
on the westbound link are effectively eliminated, thereby reducing complexity, power
consumption, and costs of an ADM, and improving a link bandwidth processing capability
of a device.
Embodiment 2
[0022] FIG. 4 is a schematic structural diagram of another ADM according to an embodiment
of the present invention. This embodiment is applied to a scenario in which link information
on two transport networks is exchanged. That is, a signal flow on an eastbound link,
a signal flow on a southbound link, and a signal flow on a northbound link are exchanged;
and a signal flow on a westbound link, the signal flow on the southbound link, and
the signal flow on the northbound link are exchanged. As shown in FIG. 4, the ADM
includes a first line board 401, a second line board 402, a third line board 403,
and a fourth line board 404, where: the first line board 401, the second line board
402, the third line board 403, and the fourth line board 404 are independent boards;
and the first line board 401, the second line board 402, the third line board 403,
and the fourth line board 404 may each have at least one standby line board. The first
line board 401 and the third line board 403 are connected to each other through inter-board
interfaces (7) and (8), and the first line board 401 and the fourth line board 404
are connected to each other through inter-board interfaces (7) and (9). The second
line board 402 and the third line board 403 are connected to each other through inter-board
interfaces (8) and (10), and the second line board 402 and the fourth line board 404
are connected to each other through inter-board interfaces (9) and (10). Each of the
first line board 401, the second line board 402, the third line board 403, and the
fourth line board 404 is provided with at least one combiner/selector and at least
one replicator/distributor. The combiner/selector and the replicator/distributor are
optical/electrical switches.
[0023] In a specific implementation process, the eastbound link passes through the first
line board 401. The first line board 401 receives an input signal on the eastbound
link, extracts a downlink service of a current node from the signal flow on the eastbound
link, and then performs replication/distribution processing on the downlink service
by using the replicator/distributor, where the extracted downlink service is separately
sent in a downlink direction to the third line board 403 and/or the fourth line board
404. The first line board 401 receives an uplink service from the third line board
403 and/or the fourth line board 404 by using the combiner/selector, and inserts the
uplink service into the signal flow on the eastbound link to form an output signal
on the eastbound link. Further, the first line board 401 outputs, from a network side
interface, the output signal that is on the eastbound link and is obtained after extraction
or insertion processing is performed.
[0024] The westbound link passes through the second line board 402. The second line board
402 receives an input signal on the westbound link, extracts a downlink service of
the current node from the signal flow on the westbound link, and then performs replication/distribution
processing on the downlink service by using the replicator/distributor, where the
extracted downlink service is separately sent in the downlink direction to the third
line board 403 and/or the fourth line board 404. The second line board 402 receives
an uplink service from the third line board 403 and/or the fourth line board 404 by
using the combiner/selector, and inserts the uplink service into the signal flow on
the westbound link to form an output signal on the westbound link. Further, the second
line board 402 outputs, from a network side interface, the output signal that is on
the westbound link and is obtained after extraction or insertion processing is performed.
[0025] The southbound link passes through the third line board 403. The third line board
403 receives an input signal on the southbound link, extracts a downlink service of
the current node from the signal flow on the southbound link, and then performs replication/distribution
processing on the downlink service by using the replicator/distributor, where the
extracted downlink service is separately sent in the downlink direction to the first
line board 401 and/or the second line board 402. The third line board 403 receives
an uplink service from the first line board 401 and/or the second line board 402 by
using the combiner/selector, and inserts the uplink service into the signal flow on
the southbound link to form an output signal on the southbound link. Further, the
third line board 403 outputs, from a network side interface, the output signal that
is on the southbound link and is obtained after extraction or insertion processing
is performed.
[0026] The northbound link passes through the fourth line board 404. The fourth line board
404 receives an input signal on the northbound link, extracts a downlink service of
the current node from the signal flow on the northbound link, and then performs replication/distribution
processing on the downlink service by using the replicator/distributor, where the
extracted downlink service is separately sent in the downlink direction to the first
line board 401 and/or the second line board 402. The fourth line board 404 receives
an uplink service from the first line board 401 and/or the second line board 402 by
using the combiner/selector, and inserts the uplink service into the signal flow on
the northbound link to form an output signal on the northbound link. Further, the
fourth line board 404 outputs, from a network side interface, the output signal that
is on the northbound link and is obtained after extraction or insertion processing
is performed.
[0027] Specifically, when the ADM is an OADM, signal flows on the eastbound link, the westbound
link, the southbound link, and the northbound link may be wavelength signals or sub-wavelength
signals, and downlink services extracted from the signal flows on the eastbound link,
the westbound link, the southbound link, and the northbound link and uplink services
inserted into the signal flows on the eastbound link, the westbound link, the southbound
link, and the northbound link may be wavelength signals or sub-wavelength signals.
In addition, extracting the downlink services from the eastbound link, the westbound
link, the southbound link, and the northbound link and inserting the uplink services
into the eastbound link, the westbound link, the southbound link, and the northbound
link may be implemented by using a wavelength selector. When the ADM is an EADM, signal
flows on the eastbound link, the westbound link, the southbound link, and the northbound
link may be timeslot signals, and downlink services extracted from the signal flows
on the eastbound link, the westbound link, the southbound link, and the northbound
link and uplink services inserted into the signal flows on the eastbound link, the
westbound link, the southbound link, and the northbound link may be timeslot signals.
In addition, extracting the downlink services from the eastbound link, the westbound
link, the southbound link, and the northbound link and inserting the uplink services
into the eastbound link, the westbound link, the southbound link, and the northbound
link may be implemented by using a timeslot selector.
[0028] In this embodiment, an eastbound link passes through a first line board, a westbound
link passes through a second line board, a southbound link passes through a third
line board, and a northbound link passes through a fourth line board. Through inter-board
interfaces, service signal flows are extracted and inserted between the first line
board and the third line board, between the first line board and the fourth line board,
between the second line board and the third line board, and between the second line
board and the fourth line board. An inter-board interface on the eastbound link, an
inter-board interface on the westbound link, an inter-board interface on the southbound
link, and an inter-board interface on the northbound link are effectively eliminated,
thereby reducing complexity, power consumption, and costs of an ADM, and improving
a link bandwidth processing capability of a device.
Embodiment 3
[0029] FIG. 5 is an exemplary flowchart of a method for processing a signal in an add/drop
multiplexer according to an embodiment of the present invention. As shown in FIG.
5, the add/drop multiplexer may be an optical add/drop multiplexer OADM and an electrical
add/drop multiplexer EADM, and specifically executes the following steps: S501. A
first line board receives a first signal from a first link, and outputs the first
signal through a second interface, where the second interface is disposed on a network
side of the first line board.
[0030] S502. The first line board receives a second signal from the first link, and outputs
the second signal to the tributary board through a first interface, where the first
interface is disposed between the tributary board and the first line board.
[0031] S503. The first line board receives a third signal from the tributary board through
the first interface, and inputs the third signal into the first link.
[0032] In a specific implementation process, the add/drop multiplexer may further include
a second line board. The second line board receives a fourth signal from a second
link, and outputs the fourth signal through a fourth interface, where the fourth interface
is disposed on a network side of the second line board; the second line board receives
a fifth signal from the second link, and outputs the fifth signal to the tributary
board through a third interface, where the third interface is disposed between the
tributary board and the second line board; and the second line board receives a sixth
signal from the tributary board through the third interface, and inputs the sixth
signal into the second link.
[0033] The add/drop multiplexer may further include the tributary board. The tributary board
receives the second signal from the first line board, generates a downlink service
by using a combiner/selector on the tributary board, and sends the downlink service
to a client device; and the tributary board receives an uplink service from the client
device, generates the third signal by using a replicator/distributor on the tributary
board, and inputs the third signal into the first line board.
[0034] The add/drop multiplexer may further include a third line board. The third line board
receives a seventh signal from a third link, and outputs the seventh signal through
a sixth interface, where the sixth interface is disposed on a network side of the
third line board; the third line board is further configured to receive an eighth
signal from the third link, and output, to the first line board through a fifth interface,
the eighth signal after the eighth signal passes through a replicator/distributor,
where the fifth interface is disposed between the first line board and the third line
board; and the third line board is further configured to receive a ninth signal from
the first line board through the fifth interface, and input the ninth signal into
the third link by using a combiner/selector.
[0035] In this embodiment, a line board of an add/drop multiplexer is configured to receive
a link signal, and the link signal is output after passing through the line board.
There is an inter-board interface between the line board and a tributary board or
between different line boards. A downlink service extracted by the line board is output
from the inter-board interface, and an uplink service inserted by the line board is
input from the inter-board interface. An inter-board interface on a link is effectively
eliminated, thereby reducing complexity, power consumption, and costs of the ADM,
and improving a link bandwidth processing capability of a device.
[0036] A person of ordinary skill in the art may be aware that, in combination with the
examples described in the embodiments disclosed in this specification, units and algorithm
steps may be implemented by electronic hardware or a combination of computer software
and electronic hardware. Whether the functions are performed by hardware or software
depends on particular applications and design constraint conditions of the technical
solutions. A person skilled in the art may use different methods to implement the
described functions for each particular application, but it should not be considered
that the implementation goes beyond the scope of the present invention.
[0037] The foregoing descriptions are merely specific implementation manners of the present
invention, but are not intended to limit the protection scope of the present invention.
Any variation or replacement readily figured out by a person skilled in the art within
the technical scope disclosed in the present invention, as defined by the appended
claims, shall fall within the protection scope of the present invention. Therefore,
the protection scope of the present invention shall be subject to the protection scope
of the claims.
[0038] The foregoing are merely some embodiments of the present invention. A person skilled
in the art may make various modifications and variations to the present invention
without departing from the scope of the present invention.
1. An add/drop multiplexer, wherein the add/drop multiplexer comprises:
a first line board (301) and a tributary board (303), wherein
the first line board (301) comprises at least a first interface (4) and a second interface,
the first interface (4) is disposed between the tributary board (303) and the first
line board (301), and the second interface is disposed on a network side of the first
line board (301);
the first line board (301) is configured to receive a first signal from a first link,
and output the first signal through the second interface;
the first line board (301) is further configured to receive a second signal from the
first link, and output the second signal to the tributary board (303) through the
first interface (4); and
the first line board (301) is further configured to receive a third signal from the
tributary board (303) through the first interface (4), and input the third signal
into the first link, wherein the add/drop multiplexer further comprises:
a second line board (302), wherein the second line board (302) comprises at least
a third interface (5) and a fourth interface, the third interface (5) is disposed
between the tributary board (303) and the second line board (302), and the fourth
interface is disposed on a network side of the second line board (302);
the second line board (302) is configured to receive a fourth signal from a second
link, and output the fourth signal through the fourth interface;
the second line board (302) is further configured to receive a fifth signal from the
second link, and output the fifth signal to the tributary board (303) through the
third interface (5); and
the second line board (302) is further configured to receive a sixth signal from the
tributary board (303) through the third interface (5), and input the sixth signal
into the second link, wherein
the tributary board (303) further comprises a switch as a combiner/selector and a
switch as a replicator/distributor;
the tributary board (303) is configured to receive the second signal from the first
line board (301), generate a downlink service by using the combiner/selector, and
send the downlink service to a client device; and
the tributary board (303) is further configured to receive an uplink service from
the client device, generate the third signal by using the replicator/distributor,
and input the third signal into the first line board (301)
2. The add/drop multiplexer according to claim 1, wherein
the tributary board (303) is disposed on either side of the first line board (301)
and the second line board (302), or the tributary board (303) is disposed on a same
side of the first line board (301) and the second line board (302).
3. A method for processing a signal in an add/drop multiplexer, wherein the method comprises:
receiving, by a first line board (301), a first signal from a first link, and outputting
the first signal through a second interface, wherein the second interface is disposed
on a network side of the first line board (301);
receiving, by the first line board (301), a second signal from the first link, and
outputting the second signal to a tributary board (303) through a first interface
(4), wherein the first interface (4) is disposed between the tributary board (303)
and the first line board (301); and
receiving, by the first line board (301), a third signal from the tributary board
(303) through the first interface (4), and inputting the third signal into the first
link, wherein the method further comprises:
receiving, by a second line board (302), a fourth signal from a second link, and outputting
the fourth signal through a fourth interface, wherein the fourth interface is disposed
on a network side of the second line board (302);
receiving, by the second line board (302), a fifth signal from the second link, and
outputting the fifth signal to the tributary board (303) through a third interface
(5), wherein the third interface (5) is disposed between the tributary board (303)
and the second line board (302); and
receiving, by the second line board (302), a sixth signal from the tributary board
(303) through the third interface (5), and inputting the sixth signal into the second
link, wherein
the tributary board (303) receives the second signal from the first line board (301),
generates a downlink service by using a switch as
a combiner/selector on the tributary board (303), and sends the downlink service to
a client device; and the tributary board (303) receives an uplink service from the
client device, generates the third signal by using a switch as a replicator/distributor
on the tributary board (303), and inputs the third signal into the first line board
(301).
1. Add/Drop-Multiplexer, wobei der Add/Drop-Multiplexer umfasst:
eine erste Line-Platine (301) und eine Hilfsplatine (303), wobei
die erste Line-Platine (301) mindestens eine erste Schnittstelle (4) und eine zweite
Schnittstelle umfasst, die erste Schnittstelle (4) zwischen der Hilfsplatine (303)
und der ersten Line-Platine (301) angeordnet ist und die zweite Schnittstelle auf
der Netzwerkseite der ersten Line-Platine (301) angeordnet ist;
die erste Line-Platine (301) zum Empfangen eines ersten Signals von einer ersten Verbindung
und zum Ausgeben des ersten Signals durch die zweite Schnittstelle konfiguriert ist;
die erste Line-Platine (301) ferner zum Empfangen eines zweiten Signals von der ersten
Verbindung und zum Ausgeben des zweiten Signals an die Hilfsplatine (303) durch die
erste Schnittstelle (4) konfiguriert ist; und
die erste Line-Platine (301) ferner zum Empfangen eines dritten Signals von der Hilfsplatine
(303) durch die erste Schnittstelle (4) und zum Eingeben des dritten Signals in die
erste Verbindung konfiguriert ist, wobei der Add/Drop-Multiplexer ferner umfasst:
eine zweite Line-Platine (302), wobei die zweite Line-Platine (302) mindestens eine
dritte Schnittstelle (5) und eine vierte Schnittstelle umfasst, die dritte Schnittstelle
(5) zwischen der Hilfsplatine (303) und der zweiten Line-Platine (302) angeordnet
ist und die vierte Schnittstelle auf einer Netzwerkseite der zweiten Line-Platine
(302) angeordnet ist;
die zweite Line-Platine (302) zum Empfangen eines vierten Signals von einer zweiten
Verbindung und zum Ausgeben des vierten Signals durch die vierte Schnittstelle konfiguriert
ist;
die zweite Line-Platine (302) ferner zum Empfangen eines fünften Signals von einer
zweiten Verbindung und zum Ausgeben des fünften Signals an die Hilfsplatine (303)
durch die erste Schnittstelle (5) konfiguriert ist; und
die zweite Line-Platine (302) ferner zum Empfangen eines sechsten Signals von der
Hilfsplatine (303) durch die dritte Schnittstelle (5) und zum Eingeben des sechsten
Signals in die zweite Verbindung konfiguriert ist, wobei
die Hilfsplatine (303) ferner einen Schalter als Kombinierer/Auswähler und einen Schalter
als Replikator/Verteiler umfasst;
die Hilfsplatine (303) zum Empfangen des zweiten Signals von der ersten Line-Platine
(301), Erzeugen eines Downlink-Diensts durch Verwendung des Kombinierers/Auswählers
und Senden des Downlink-Diensts an eine Clientvorrichtung konfiguriert ist; und
die Hilfsplatine (303) ferner zum Empfangen eines Uplink-Dienst von der Clientvorrichtung,
Erzeugen des dritten Signals durch Verwendung des Replikators/Verteilers und Eingeben
des dritten Signals in die erste Line-Platine (301) konfiguriert ist.
2. Add/Drop-Multiplexer nach Anspruch 1, wobei
die Hilfsplatine (303) an jeder Seite der ersten Line-Platine (301) und der zweiten
Line-Platine (302) angeordnet ist oder die Hilfsplatine (303) an einer selben Seite
der ersten Line-Platine (301) und der zweiten Line-Platine (302) angeordnet ist.
3. Verfahren zum Verarbeiten eines Signals in einem Add/Drop-Multiplexer, wobei das Verfahren
umfasst:
Empfang eines ersten Signals durch eine erste Line-Platine (301) von einer ersten
Verbindung und Ausgabe des ersten Signals durch eine zweite Schnittstelle, wobei die
zweite Schnittstelle auf einer Netzwerkseite der ersten Line-Platine (301) angeordnet
ist;
Empfang eines zweiten Signals durch die erste Line-Platine (301) von der ersten Verbindung
und Ausgabe des zweiten Signals an eine Hilfsplatine (303) durch eine erste Schnittstelle
(4), wobei die erste Schnittstelle (4) zwischen der Hilfsplatine (303) und der ersten
Line-Platine (301) angeordnet ist; und
Empfang eines dritten Signals von der Hilfsplatine (303) durch die erste Line-Platine
(301) durch die erste Schnittstelle (4) und Eingabe des dritten Signals in die erste
Verbindung, wobei das Verfahren ferner umfasst:
Empfang eines vierten Signals durch eine zweite Line-Platine (302) von einer zweiten
Verbindung und Ausgabe des vierten Signals durch eine vierte Schnittstelle, wobei
die vierte Schnittstelle auf einer Netzwerkseite der zweiten Line-Platine (302) angeordnet
ist;
Empfang eines fünften Signals durch die zweite Line-Platine (302) von der zweiten
Verbindung und Ausgabe des fünften Signals an die Hilfsplatine (303) durch eine dritte
Schnittstelle (5), wobei die dritte Schnittstelle (5) zwischen der Hilfsplatine (303)
und der zweiten Line-Platine (302) angeordnet ist; und
Empfang eines sechsten Signals von der Hilfsplatine (303) die zweite Line-Platine
(302) durch die dritte Schnittstelle (5) und Eingabe des sechsten Signals in die zweite
Verbindung, wobei
die Hilfsplatine (303) das zweite Signal von der ersten Line-Platine (301) empfängt,
einen Downlink-Dienst durch Verwendung eines Schalters als Kombinierer/Auswähler auf
der Hilfsplatine (303) erzeugt und den Downlink-Dienst an eine Clientvorrichtung sendet;
und die Hilfsplatine (303) einen Uplink-Dienst von der Clientvorrichtung empfängt,
das dritte Signal durch Verwendung eines Schalters als Replikator/Verteiler auf der
Hilfsplatine (303) empfängt und das dritte Signal in die erste Line-Platine (301)
eingibt.
1. Multiplexeur d'insertion/extraction, le multiplexeur d'insertion/extraction comprenant
:
une première carte de ligne (301) et une carte tributaire (303), dans lequel la première
carte de ligne (301) comprend au moins une première interface (4) et une deuxième
interface, la première interface (4) est disposée entre la carte tributaire (303)
et la première carte de ligne (301) et la deuxième interface est disposée côté réseau
de la première carte de ligne (301) ;
la première carte de ligne (301) est configurée pour recevoir un premier signal en
provenance d'une première liaison et pour émettre le premier signal par le biais de
la deuxième interface ;
la première carte de ligne (301) est en outre configurée pour recevoir un deuxième
signal en provenance de la première liaison et pour émettre le deuxième signal à la
carte tributaire (303) par le biais de la première interface (4) ; et
la première carte de ligne (301) est en outre configurée pour recevoir un troisième
signal en provenance de la carte tributaire (303) par le biais de la première interface
(4) et pour entrer le troisième signal dans la première liaison, le multiplexeur d'insertion/extraction
comprenant en outre :
une seconde carte de ligne (302), dans lequel la seconde carte de ligne (302) comprend
au moins une troisième interface (5) et une quatrième interface, la troisième interface
(5) est disposée entre la carte tributaire (303) et la deuxième carte de ligne (302)
et la quatrième interface est disposée côté réseau de la deuxième carte de ligne (302)
;
la seconde carte de ligne (302) est configurée pour recevoir un quatrième signal en
provenance d'une seconde liaison et pour émettre le quatrième signal par le biais
de la quatrième interface ;
la seconde carte de ligne (302) est en outre configurée pour recevoir un cinquième
signal en provenance de la seconde liaison et pour émettre le cinquième signal à la
carte tributaire (303) par le biais de la troisième interface (5) ; et
la seconde carte de ligne (302) est en outre configurée pour recevoir un sixième signal
en provenance de la carte tributaire (303) par le biais de la troisième interface
(5) et pour entrer le sixième signal dans la seconde liaison, dans lequel
la carte tributaire (303) comprend en outre un commutateur en tant que combineur/sélecteur
et un commutateur en tant que réplicateur/distributeur ;
la carte tributaire (303) est configurée pour recevoir le deuxième signal en provenance
de la première carte de ligne (301), pour générer un service de liaison descendante
en utilisant le combineur/sélecteur et pour envoyer le service de liaison descendante
à un dispositif client ; et
la carte tributaire (303) est configurée pour recevoir un service de liaison montante
en provenance du dispositif client, pour générer le troisième service en utilisant
le réplicateur/distributeur et pour entrer le troisième signal dans la première carte
de ligne (301).
2. Multiplexeur d'insertion/extraction selon la revendication 1, dans lequel la carte
tributaire (303) est disposée sur l'un ou l'autre côté de la première carte de ligne
(301) et de la seconde carte de ligne (302) ou la carte tributaire (303) est disposée
sur un même côté de la première carte de ligne (301) et de la seconde carte de ligne
(302).
3. Procédé pour traiter un signal dans un multiplexeur d'insertion/extraction, le procédé
consistant :
à recevoir, au moyen d'une première carte de ligne (301), un premier signal en provenance
d'une première liaison et à émettre le premier signal par le biais d'une deuxième
interface, dans lequel la deuxième interface est disposée côté réseau de la première
carte de ligne (301) ;
à recevoir, au moyen de la première carte de ligne (301), un deuxième signal en provenance
de la première liaison et à émettre le deuxième signal à la carte tributaire (303)
par le biais d'une première interface (4), dans lequel la première interface (4) est
disposée entre la carte tributaire (303) et la première carte de ligne (301) ; et
à recevoir, au moyen de la première carte de ligne (301), un troisième signal en provenance
de la carte tributaire (303) par le biais de la première interface (4) et à entrer
le troisième signal dans la première liaison, le procédé consistant en outre :
à recevoir, au moyen d'une seconde carte de ligne (302), un quatrième signal en provenance
d'une seconde liaison et à émettre le quatrième signal par le biais d'une quatrième
interface, dans lequel la quatrième interface est disposée côté réseau de la deuxième
carte de ligne (302) ;
à recevoir, au moyen de la seconde carte de ligne (302), un cinquième signal en provenance
de la seconde liaison et à émettre le cinquième signal à la carte tributaire (303)
par le biais d'une troisième interface (5) dans lequel la troisième interface (5)
est disposée entre la carte tributaire (303) et la seconde carte de ligne (302) ;
et
à recevoir, au moyen de la seconde carte de ligne (302), un sixième signal en provenance
de la carte tributaire (303) par le biais de la troisième interface (5) et à entrer
le sixième signal dans la seconde liaison, dans lequel
la carte tributaire (303) reçoit le deuxième signal en provenance de la première carte
de ligne (301), génère un service de liaison descendante en utilisant un commutateur
comme combineur/sélecteur sur la carte tributaire (303) et envoie le service de liaison
descendante à un dispositif client ; et la carte tributaire (303) reçoit un service
de liaison montante en provenance du dispositif client, génère le troisième service
en utilisant un commutateur comme réplicateur/distributeur sur la carte tributaire
(303) et entre le troisième signal dans la première carte de ligne (301).